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ISSN: 2375-3846

American Journal of Science and Technology

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Optimization Method for Setting Waterproof Coal-Rock Pillar of Gently Inclined Coal Seam Under Cenozoic Loose Aquifer

American Journal of Science and Technology
Vol.2 , No. 4, Publication Date: May 13, 2015, Page: 124-133

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Authors

[1]	Wang Hua, Institute of Mine Construction, Tiandi Science and Technology Co., Ltd., Beijing, China; Beijing China Coal Mine Construction Engineering Company Co., Ltd., Beijing, China; National Engineering Laboratory for Deep Shaft Construction Technology in Coal Mine, Beijing, China.

Abstract

Rationally setting waterproof coal-rock pillar of Cenozoic loose sedimentary aquifer is the presupposition to improve coal recovery and ensure mine safety. Firstly, we had rock mechanics test for overburden strata of 8 coal seam at the upper section in West No.1 Mining Area of Panji No.3 Mine in Huainan Panji-xieqiao Mining Area, and pumping test for the Lower Aquifer of Cenozoic loose sedimentary stratum and 8 coal seam roof sandstone water; Secondly, we used “Regulations of pillar leaving and coal mining under building, water, railway and main shaft and tunnel” (“Three Under Regulations” for short), “Water prevention regulation of coal mines” to analyze and calculate the safe waterproof coal pillar setting thickness between the Lower Aquifer of Cenozoic loose sedimentary stratum and 8 coal seam, and had optimization design of mining faces were carried out at this section; Thirdly, through similar simulation test, we studied the deformation evolution law of overburden strata along the inclined direction of 8 coal seam, and analyzed the relations between uphill caving angle, downhill caving angle and dip angle of coal seam, thereby the feasibility of reducing waterproof coal pillar between the Lower Aquifer of Cenozoic loose sedimentary stratum and 8 coal seam was calculated and analyzed, and the feasible research methodology for the reasonable design of waterproof coal and rock pillar for gently inclined coal seam under extremely thick unconsolidated strata were explored.

Keywords

Gently Inclined Coal Seam, Cenozoic Loose Sedimentary Aquifer, Waterproof Coal Pillar, Optimization Method, Similar Simulation Test, Caving Angle

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