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公开(公告)号：US20200378256A1
公开(公告)日：2020-12-03
申请号：US16632543
申请日：2019-04-01
申请人： China University of Mining and Technology , XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO., LTD.
发明人： Jixiong ZHANG , Wenyue QI , Qiang ZHANG , Kai SUN , Nan ZHOU , Hengfeng LIU
摘要： The present invention discloses a mine exploitation, separation, filling and treatment exploitation method, including main sources of gangue on a small-volume gangue exploitation working face and gangue reducing measures; system layout, equipment and separation technology for coal gangue separation; system layout, equipment and production technology for filling synergistic caving type coal efficient stoping; pretreatment and pre-control measures for environmental influence before and after gangue filling; and design principle and design steps of the mine “exploitation, separation, filling and treatment” exploitation method. The method not only solves the problem of long-distance transportation of gangue, reduces the lifting cost of underground gangue and relieves the pressure of mine auxiliary lifting and ground coal washing plants, but also may effectively treat coal mine gangue, reduce the surface stacking area of coal gangue, reduce the damage to the ecological environment of a mine and protect an ecological environment. Furthermore, a gangue filling and coal efficient stope face has high single production efficiency, may meet the requirements of modern mines for production capacity, and application prospects are wide.
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公开(公告)号：US20210148228A1
公开(公告)日：2021-05-20
申请号：US16626328
申请日：2019-04-01
申请人： China University of Mining and Technology , XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO.,LTD
发明人： Jixiong ZHANG , Qiang ZHANG , Wenyue QI , Meng LI , Jianfeng SUN , Guohao MENG
摘要： The present invention discloses a mine exploitation, separation and filling and X exploitation mode, including four “exploitation, separation and filling and X” exploitation modes, namely an “exploitation, separation and filling and retaining” exploitation mode, an “exploitation, separation and filling and treatment” exploitation mode, an “exploitation, separation and filling and extraction” exploitation mode, and an “exploitation, separation and filling and control” exploitation mode. The selection of the “exploitation, separation and filling and X” exploitation mode is determined by actual engineering needs. A goaf filling rate is designed to meet the actual engineering needs of the mine, solve the technical problems in mine resource exploitation, and realize the objective of green, harmonious and safe exploitation of coal resources. Compared with an original “exploitation, separation and filling” exploitation mode, the “exploitation, separation and filling and X” exploitation mode is more systematic and comprehensive and is beneficial to engineering promotion and application.
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公开(公告)号：US20200003667A1
公开(公告)日：2020-01-02
申请号：US16091523
申请日：2017-11-16
发明人： Jixiong ZHANG , Xiaole HAN , Qiang ZHANG , Lixin LAN , Yadong CHEN , Yang TAI
摘要： A method for determining a physical similarity simulation material of a solid backfill body is provided. A compaction test is run on a gangue backfill body in a lab, to obtain a ε-σ curve regarding the gangue backfill body in the compaction process. Backfill blocks are made by using a thin wood board, sponge, and a paper sheet in different proportions, and then an unconfined compression test is separately run on the backfill blocks used for physical similarity simulation, to obtain εi-σi curves regarding the backfill blocks in the compression process. A sum of squared errors Σ(εi−ε0)2 is introduced to separately calculate a sum of squared errors of the backfill block and that of the gangue backfill body, and accordingly an error between ε-σ curves regarding the test block and the gangue backfill body is determined. Finally, a backfill block for which the sum of squared errors is less than 0.5 is determined as a physical similarity simulation material of the gangue backfill body. By fabrication and selection of similar materials, the present invention can reduce an error caused by a selected backfilling material during a physical similarity simulation experiment, guaranteeing the accuracy of the physical similarity simulation experiment for solid backfill mining.
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4.发明申请公开(公告)号：US20190071967A1
公开(公告)日：2019-03-07
申请号：US15767132
申请日：2016-11-18
发明人： Jixiong ZHANG , Qiang ZHANG , Qiang SUN , Xiancheng MEI
摘要： A mining design method for an upper protective layer in coal seam mining, and provides a mining design method for a near-whole rock upper protective layer. Based on information about engineering geologic conditions of a protective layer mining well and physico-mechanical parameters of a coal-rock mass sample, a protective layer mining thickness M and an interval H between the protective layer and the protected layer are determined by means of numerical analysis such that an expansion deformation rate φ of a protected layer, a failure depth K of a floor plastic zone of a protective layer, and a coal seam gas pressure P meet the Provision in Prevention and Control of Coal and Gas Outburst. Then, according to a mining thickness percentage accounted by rock in the near-whole rock upper protective layer, a mining process of the near-whole rock protective layer is determined from among a traditional fully-mechanized coal mining process, a traditional fully-mechanized coal mining process assisted by single-row hole pre-splitting blasting, and a traditional fully-mechanized coal mining process assisted by double-row twisted hole blasting. This method provides a theoretical basis for safe mining of a low-permeability gas-rich coal seam without a regular protective layer, and further enriches mining design methods with a protective layer. This method is economically efficient, safe and efficient, and has a wide applicability.
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公开(公告)号：US20170138194A1
公开(公告)日：2017-05-18
申请号：US15319292
申请日：2015-05-13
发明人： Feng JU , Xiexing MIAO , Jixiong ZHANG , Xuejie DENG , Xufeng WANG
CPC分类号： E21D23/0481 , E21D15/60 , E21D23/0004 , E21F13/008 , E21F15/02 , E21F15/06 , E21F15/08
摘要： A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a n-type steel beam before each hydraulic support is removed. A supporting roof is reinforced in time by means of erecting a crib (13) and grouting after each hydraulic support is removed, three grouting pipelines (12) are laid after the supports of the whole work surface are removed, and grouting is carried out in the whole finishing cut space. The roof of the support removing space of the work surface is stable so that the hydraulic supports on the work surface of solid filling coal mining are ensured to be safely and efficiently removed.
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6.发明申请公开(公告)号：US20210277779A1
公开(公告)日：2021-09-09
申请号：US17253126
申请日：2019-06-24
发明人： Jixiong ZHANG , Yang JU , A.J.S. (Sam) Spearing , Meng LI , Nan ZHOU , Weiqing ZHANG
摘要： Provided are a system and a method for monitoring bearing compression rate of a filler in a coal mine gob area. An ground information processing system, a vibration source control system, and a monitoring system are arranged on the ground according to a buried depth of the filler in the gob area. The vibration source control system generates vibration, and transmits a signal to the filler. The monitoring system on the ground receives different reflected waves according to different elasticities of the fillers under different compaction degrees. Final data is transmitted to the ground information processing system for data processing. The monitoring of the filler starts when the filler is filled in the gob area; the filler is gradually compacted. The filler is monitored until the thickness of the filler does not change. Finally, a bearing compression rate formula is utilized to calculate the bearing compression rate of the filler.
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7.发明申请公开(公告)号：US20190301283A1
公开(公告)日：2019-10-03
申请号：US16300586
申请日：2016-11-21
发明人： Jixiong ZHANG , Qiang ZHANG , Xiancheng MEI , Kun FANG , Xiaole HAN
IPC分类号： E21D23/04
摘要： A method for recovering room-mining coal pillars by solid filling in synergy with artificial pillars. Solid materials and cementing materials on the ground are conveyed through a feeding well and a pipeline to a room-and-pillar goaf, a plurality of artificial pillars is cast at an interval in a coal room area, and gangue is cast to fill other regions of the coal room using a gangue casting machine. Under joint support by the artificial pillars and the coal room filler, coal pillars are recovered using a continuous coal mining machine, artificial pillars are cast in the original coal pillar area after recovery, and gangue is cast to fill the original coal pillar area using the gangue casting machine. A system for recovering room-mining coal pillars by solid filling in synergy with artificial pillars mainly includes a material conveying system, a joint support system, and a coal pillar recovery system. By constructing pillar grooves, casting artificial pillars, casting gangue to fill a goaf, and recovering coal pillars, the recovery rate of coal resources can be increased, and room-mining coal pillar recovery theories and technologies in China can be enriched while harmonious development of environmental protection and resource exploitation is promoted.
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公开(公告)号：US20200378255A1
公开(公告)日：2020-12-03
申请号：US16603832
申请日：2019-02-22
发明人： Nan ZHOU , Jiaqi WANG , Jixiong ZHANG , Kai SUN , Meng LI
摘要： An internally injected replacement support room-type coal pillar recovery method is provided. During the recovery the room-type coal pillars with an aspect ratio greater than 0.6 are divided into two parts: reserved coal pillars and pre-mined coal pillars. After the mining of the pre-mined coal pillars, a cemented filling material is injected into a goaf surrounded by the reserved coal pillars, and is stabilized to replace the coal pillars for support, and the reserved coal pillars are recovered. A mechanical model of the reserved coal pillars in a support overburden stage is established based on the Winkler beam theory, to obtain displacement and stress conditions of a roof of the reserved coal pillar in a support stage. A theoretical reserve-width of the reserved coal pillars is obtained according to a first strength theory of the roof and a criterion of ultimate strength of the reserved coal pillars.
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公开(公告)号：US20190085690A1
公开(公告)日：2019-03-21
申请号：US16088452
申请日：2016-12-01
发明人： Jixiong ZHANG , Qiang ZHANG , Yanlong CHEN , Kai QUAN , Hao YAN
IPC分类号： E21D15/502 , E21D15/54 , E21D15/02
摘要： An apparatus for pre-loading a mechanical constant-resistance single prop includes a rhombic stretchable bracket, a screw rod, a first cylindrical sleeve ring, and a second cylindrical sleeve ring. The screw rod is connected to two opposite apex corners of the rhombic stretchable bracket. A tail end of the screw rod is fixedly connected to one apex corner of the rhombic stretchable bracket. An end head of the screw rod passes through another apex corner of the rhombic stretchable bracket. The remaining two opposite apex corners of the rhombic stretchable bracket are respectively fixedly connected to edges of the first cylindrical sleeve ring and the second cylindrical sleeve ring through connecting rods. The screw rod is threadedly connected to the apex corner of the rhombic stretchable bracket through which the screw rod passes. A method for pre-loading a mechanical constant-resistance single prop is also provided.
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10.发明申请公开(公告)号：US20180314770A1
公开(公告)日：2018-11-01
申请号：US15770500
申请日：2016-11-18
发明人： Jixiong ZHANG , Qiang SUN , Qiang ZHANG , Wei YIN , Hao YAN
IPC分类号： G06F17/50 , G06Q50/02 , G06F11/263 , E21D23/04
CPC分类号： G06F17/5004 , E21C41/16 , E21D23/00 , E21D23/0481 , E21F15/00 , E21F15/005 , E21F15/04 , G06F11/263 , G06F17/5009 , G06Q50/02
摘要： Disclosed is a method for designing supporting parameters of a transition support for a mixed mining face of filling and fully-mechanized mining. The method includes: first, determining a total length of a mixed mining working face and a length of a filling section according to requirements of a coal mining production capacity of the mixed mining working face and a filling capacity of the filling section working face; then, establishing a mixed mining numerical model of filling and fully-mechanized mining by using three-dimensional distinct element software, and simulating and calculating a caving height of a roof of a transition section and a stress influence range of the transition section when a filling rate of a mined-out area of the filling section changes; based on a result of numerical simulation and calculation, performing curve fitting according to a correlation coefficient to obtain a functional relationship between the filling rate and the caving height and a functional relationship between the filling rate and the stress influence range of the transition section; and finally designing supporting parameters of a transition support in combination with actual engineering geological parameters. The method can provide a reference for supporting design of a support, and enables a smooth transition between a filling support and a fully-mechanized mining support for a mixed working face, thereby further enriching filling mining theories and expanding the application range of filling mining.
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