基于渗流力学的高瓦斯综放面窄煤柱宽度确定机制  

Determination mechanism of narrow coal pillar width in fully mechanized caving face with high gas based on seepage mechanics

作　　者：王凯 郝兵元[2] 张鹏鹏[2] 乔永凤 Wang Kai Hao Bingyuan Zhang Pengpeng Qiao Yongfeng(Department of Mining Engineering, Shanxi Institute of Technology, Yangquan, Shanxi 045000, China College of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China)

机构地区：[1]山西工程技术学院矿业工程系,山西省阳泉市045000 [2]太原理工大学矿业工程学院,山西省太原市030024

出　　处：《中国煤炭》2017年第5期47-51,共5页China Coal

基　　金：山西省科技重大专项(20121101009-03);山西省自然科学基金重点项目(2014011044)

摘　　要：针对高瓦斯综放面沿空窄煤柱阻隔邻空区瓦斯有效性的问题,采用渗流力学及数值模拟的方法分析了煤柱内稳定区厚高比与瓦斯渗流量关系,以及不同宽度煤柱受动压影响时两侧破碎区演化规律。结果表明,超前支承压力强烈影响范围内,窄煤柱稳定区厚高比达到0.5,即可有效阻隔邻空区瓦斯。煤柱较小时,超前支承压力强烈影响范围内煤柱全部进入破碎状态;随煤柱宽度增大,超前支承压力强烈影响范围内煤柱出现稳定区,其两侧破碎区厚度之和为定值。研究成果在阳煤五矿8407综放面成功应用,并取得了显著的技术经济效益。In order to confirm the availability of gob-side narrow coal pillar to prevent gas emission of gob in fully mechanized face with high gas, seepage mechanics and numerical simulation were used to analyze the relationship between thickness-height ratio of stable zone and gas seepage in coal pillar, as well as the revolution law of broken zone on both sides of coal pillar with different width under influence of dynamic pressure. The results showed that under the strong influence of advanced bearing pressure, gas of adjacent gob was blocked when the thickness-height ratio of stable zone in coal pillar reached 0.5. The pillar was broken completely when pillar was narrower. With pillar width increased, the stable zone appeared in the pillar in the strong influence range of advanced abutment pressure and sum of broken zones＇ thickness on both sides of coal pillar was a constant value. The research results had been applied successfully in the 8407 working face in No. 5 Coal Mine of Yangquan Coal Industry Group and achieved remarkable technical and economic effects.

关 键 词：高瓦斯 综放面 渗流力学 数值模拟 窄煤柱 合理宽度 

分 类 号：TD322.4[矿业工程—矿井建设]