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公开(公告)号：US11021954B2
公开(公告)日：2021-06-01
申请号：US16763426
申请日：2019-02-22
发明人： Nan Zhou , Hengfeng Liu , Meng Li , Zhongya Wu , Jixiong Zhang
摘要： A method of recovering a room-and-pillar coal pillar by using external replacement supports. In the recovery of a room-and-pillar coal pillar, a cement material wall is formed by performing pouring around a coal pillar having a width to height ratio of less than 0.6, by means of a single-pillar sack arrangement technique, such that a coal pillar resource may be mined while a wall made from a cement filling material supports an overlying stratum. After mining is complete, a coal pillar goaf region is filled with the cement filling material, and after the cement filling material solidifies and is stable, the single pillar can be recovered.
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2.发明申请INCLINED LAYERED SOLID-FILLING MINING METHOD IN ULTRATHICK COAL LAYER 有权在ULTRATHICK煤层中采用层叠式固体填充采矿方法公开(公告)号：US20160102553A1
公开(公告)日：2016-04-14
申请号：US14891288
申请日：2014-01-22
发明人： Jixiong Zhang , Nan Zhou , Qiang Zhang , Jiwei Guo , Xiaoming Shen , Feng Ju , Haiqiang Jiang
CPC分类号： E21F15/02 , E21C41/04 , E21C41/16 , E21D23/0481
摘要： An inclined layered solid-filling mining method in an ultrathick coal layer is applicable to exploitation in a “three-unders” ultrathick coal layer. In this method, the number of inclined layers is determined based on a principle of layered thickness from 2.5 m to 4.5 m, and a layered-exploitation downward-filling exploitation order is adopted. Tunnels and equipment are arranged according to a conventional solid-filling mining method. A cyclic order of mining, layout of metal meshes (14) and bamboo fences (24), and filling is adopted, so as to accomplish filling and exploitation of a first mining face and a first layer (21). Meanwhile, 4 months after the working face of this layer is finished, at a corresponding position in a second layer (22), under the cover of an artificial ceiling formed by the first layer (21), exploitation is performed by using the same filling mining method; such a cycle is repeated, and exploitation in a current layer is performed under the cover of an artificial ceiling fabricated by an upper layer, until the entire ultrathick coal layer is finished. When this method is adopted to exploit “three-unders” ultrathick coal layer resources, strata movement and earth surface subsidence may be effectively controlled; the method has a high extraction rate, high production efficiency, and low cost.
摘要翻译： 超薄煤层倾斜层状固体填充开采方法适用于“三低”超薄煤层的开采。 在该方法中，倾斜层的数量根据层叠厚度为2.5μm〜4.5μm的原理确定，采用层叠剥离向下填充开采顺序。 隧道和设备根据常规的固体填充开采方法进行排列。 采用循环采矿顺序，金属网格（14）和竹栅栏布置（24），填充，完成第一采矿面和第一层的灌装开采（21）。 同时，在该层的工作面完成4个月后，在第二层（22）的相应位置，在由第一层（21）形成的人造天花板的盖下，利用相同的填充物 采矿方法; 重复这样一个循环，并且在由上层制造的人造天花板的盖子下进行当前层的开采，直到整个超薄煤层完成。 采用这种方法开发“三低”超薄煤层资源时，可以有效控制地层运动和地表沉降; 该方法提取率高，生产效率高，成本低。
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公开(公告)号：US20210355826A1
公开(公告)日：2021-11-18
申请号：US16613926
申请日：2018-09-20
发明人： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
摘要： Provided is a method for recovering room-type coal pillars by cemented filling of reserved roadways, which is especially suitable for safe and efficient recovery of left coal pillars in room-type mining faces in mining areas where the ecological system is fragile, such as in western China. In the method, by constructing reserved roadways in two adjacent rows of room-type goafs, excavating coal pillar roadways in room-type coal pillars, and finally interconnecting the reserved roadways with the coal pillar roadways to form a U-shaped working face, room-type left coal pillars are recovered. Thus, not only the workload of roadway excavation is reduced, but also the recovery ratio of the coal resources is maximized. The method provides a novel technical model for the recovery of room-type left coal pillars in mining areas, such as in western China.
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公开(公告)号：US11143025B2
公开(公告)日：2021-10-12
申请号：US16608920
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 , Zhongyu Wu , Feng Ju , Jiaqi Wang , Yang Chen
摘要： A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.
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公开(公告)号：US20200241169A1
公开(公告)日：2020-07-30
申请号：US16756819
申请日：2019-04-18
发明人： Meng Li , Jixiong Zhang , A.J.S. (Sam) Spearing , Zhongya Wu , Nan Zhou , Feng Gao
摘要： The present invention discloses a method for determining internal stress of a solid filling material, comprising the following steps: step 1) acquiring stress data of the solid filling material, and fitting the stress-strain relationship of the solid filling material; step 2) calculating surface subsidence in the solid filling area on the basis of an equivalent mining height theory with a probability integration method; step 3) calculating the expansion height of fractured zones in the area under a solid-backfill coal mining condition; step 4) calculating the strain in the solid filling material at a distance L from the rear of the stope by combing with step 2) and step 3); step 5) calculating internal stress in the solid filling material at distance L from the rear of the working face. The present invention attains the following beneficial effects: the present invention provides a method for calculating the stress in filling mass for solid-backfill coal mining. The method is simple and practical, and is of great significance for reckoning the distribution of the stress in the surrounding rock for solid backfill mining, guiding the backfill mining support design, and enriching the backfill mining pressure theory system.
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公开(公告)号：US10352167B2
公开(公告)日：2019-07-16
申请号：US16084971
申请日：2016-12-01
发明人： Jixiong Zhang , Nan Zhou , Wenyue Qi , Qiang Zhang , Meng Li
摘要： The present invention discloses a process method for withdrawing and recovering a mechanical constant-resistance single prop, specific steps involving: detecting a working resistance and a degree of deformation of a mechanical constant-resistance single prop, releasing lug clamp bolts of a recoverable base, knocking a lower portion of a cylinder body of the mechanical constant-resistance single prop to disengage the mechanical constant-resistance single prop from the recoverable base, and dismantling the mechanical constant-resistance single prop. Parts are classified and recovered based on degree of deformation thereof. By means of the foregoing method, a process of withdrawing and recovering a mechanical constant-resistance single prop is standardized, simple and fast disengagement of the mechanical constant-resistance single prop is achieved, and parts that can still be used can be sufficiently recovered and reused, thereby achieving the objectives of saving energy and reducing costs.
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公开(公告)号：US11339658B2
公开(公告)日：2022-05-24
申请号：US16613926
申请日：2018-09-20
发明人： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
摘要： Provided is a method for recovering room-type coal pillars by cemented filling of reserved roadways, which is especially suitable for safe and efficient recovery of left coal pillars in room-type mining faces in mining areas where the ecological system is fragile, such as in western China. In the method, by constructing reserved roadways in two adjacent rows of room-type goafs, excavating coal pillar roadways in room-type coal pillars, and finally interconnecting the reserved roadways with the coal pillar roadways to form a U-shaped working face, room-type left coal pillars are recovered. Thus, not only the workload of roadway excavation is reduced, but also the recovery ratio of the coal resources is maximized. The method provides a novel technical model for the recovery of room-type left coal pillars in mining areas, such as in western China.
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公开(公告)号：US11313226B2
公开(公告)日：2022-04-26
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：US09988905B2
公开(公告)日：2018-06-05
申请号：US15101877
申请日：2015-06-12
发明人： Jixiong Zhang , Nan Zhou , Wei Yin , Meng Li
CPC分类号： E21F17/18 , B65G43/00 , B65G43/02 , B65G43/08 , B65G2201/045 , B65G2203/0258 , B65G2203/041 , E21F13/04 , E21F15/06 , H04N7/181
摘要： A solid-filling coal mining feeding and conveying monitoring system, suitable for monitoring of a vertical feeding and conveying system in underground mine solid-filling mining. The monitoring system mainly consists of an industrial control computer, a PLC control box, an operating platform, a liquid crystal display, a color four-picture divider, two video optical receivers and loudspeakers, four cameras, uphole electronic belt scales, downhole electronic belt scales, a radar level meter, a coal level sensor, a vibration sensor, and various matching junction boxes and cables, the components being installed in positions such as a material field, a control room, upper and lower openings of a storage silo, and a gangue transportation lane. The system implements four main functions of a solid-filling material transportation and feeding process, the four main functions being status monitoring, a full silo alarm, centralized control, and recording and querying. The monitoring content of the system is comprehensive; operation of the system is simple; and the system is safe and reliable.
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公开(公告)号：US09938083B2
公开(公告)日：2018-04-10
申请号：US14917817
申请日：2015-04-21
发明人： Jixiong Zhang , Qiang Zhang , Rui Gao , Hao Yan , Meng Li
CPC分类号： B65G11/206 , B65G11/088 , B65G65/32 , B65G69/00 , B65G69/16 , B65G2201/045 , B65G2207/28 , B65G2814/0211
摘要： A mechanical rocker-arm type vertical feeding cushioning device, consisting of two identical cushioning units and a box body (7). The two cushioning units are respectively arranged with a certain height difference on the inner side of the box body (7). Each cushioning unit consists of a cushioning mechanism and a fixing hinge mechanism. The cushioning mechanism is composed of a cushioning plate (1), a spring (5) and a balance weight (6). The fixing hinge mechanism is composed of a hinge plate (2), a right angle circular rod (3) and an elastic limiting device (4). The cushioning plate (1) is fixed to the hinge plate (2) via connection holes and using bolts. The hinge plate (2) is welded to the right angle circular rod (3). The elastic limiting device (4) consists of two elastic limiting plates and a hollow iron ring in a welded manner. The right angle circular rod (3) is connected to the elastic limiting device (4) in a sleeved manner via the hollow iron ring of the elastic limiting device (4). An upper end of the spring (5) is connected to the right angle circular rod (3), and the balance weight (6) is suspended at a lower end of the spring (5). Material is fed to the cushioning plates via a feeding pipe, and falls down after being cushioned twice by the cushioning plates (1). The cushioning device repeatedly cushions and recovers under the joint effect of the cushioning plates (1) and the cushioning balances (6).
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