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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
Applicant: China University of Mining and Technology , XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO., LTD.
Inventor： Jixiong ZHANG , Wenyue QI , Qiang ZHANG , Kai SUN , Nan ZHOU , Hengfeng LIU
Abstract: 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：US20200378255A1
公开(公告)日：2020-12-03
申请号：US16603832
申请日：2019-02-22
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan ZHOU , Jiaqi WANG , Jixiong ZHANG , Kai SUN , Meng LI
Abstract: 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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