走向高抽巷参数优化的理论与模拟研究

Theoretical and simulation study of strike drift high alley pumping parameters optimization

采煤工作面上隅角和回风巷瓦斯超限的问题,严重制约煤矿的安全生产.采用理论分析、数值模拟和现场验证相结合的研究方法,结合山西潞安集团某矿S2107综放面的实际情况,对走向高抽巷参数优化进行系统的分析研究.结果表明：在裂隙带发育高度理论分析计算和数值模拟研究的基础上,确定S2107综放面高抽巷的最优层位高度为34.06 ～40.37 m,最优平距为距回风巷平行距离30 ～40 m的位置,在S2107综放面实施高抽巷后,工作面的上隅角和回风巷瓦斯浓度明显降低,可以保障S2107综放面的安全高效生产,同时验证了理论计算和数值模拟的正确性.

This paper manages to eliminate the serious restriction to the safety production of coal mine,a notorious challenge triggered by methane gas overrun in the upper comer and the return airway.The focused elimination involves a systematic analysis of the parameter optimization of high-position alley pumping,using the combination method of theoretical analysis,numerical simulation,and on-the-spot verification and depending on the actual situation of S2107 fully mechanized top coal caving face located in a coal mine of Shanxi Lu＇an Mining Group.The result demonstrates that,as the result of the theoretical analysis and calculation and the numerical simulation based on the theory on the development height of fractured belt,the S2107 fully mechanized top coal caving face is assumed to have a strike high level suction roadway with the optimal vertical height of 34.06 to 40.37 m and the horizontal length of 30 ～ 40 m distance from the return airway; and the implementation of top-coal drawing technique in S2107 fully mechanized top coal caving face is followed by a significant decrease in the methane gas concentration in the upper corner and the return airway,thus ensuring the safe and efficient production in S2107 fully mechanized top coal caving face and simultaneously verifying the validity of the theoretical calculation and numerical simulation.