基于微震监测技术在回采工作面的应用,采用该技术对厚表土深井综放开采工作面覆岩运动规律和采动支承压力分布规律进行了研究,并结合监测参数为工作面支架工作阻力的确定提供依据。研究结果表明:工作面周期来压步距21.6～25.4 m,平均23.4 m;高位顶板来压步距56.3～62.3 m,平均59.3 m,最大断裂高度70 m;煤层直接顶厚度、基本顶板和高位顶板厚度分别为30、20、20 m;工作面走向支承压力影响范围42.7～54.2 m,平均48.6 m,并确定了支承压力峰值位置,为矿井回采过程中超前支护距离的确定提供理论依据。根据微震监测技术获得的矿压参数确定支架合理的工作阻力为15 000 kN。

Based on the application of the micro seismic monitoring and measuring technology to the coal mining face ,the monitoring and measuring technology wa s applied to the study on the overburden strata movement law and the mining support pressure distribution law of the fully mechanized top coal caving mining face in de ep mine with thick overburden.In combination with the monitoring and measuring parameters,the basis could be provided to determine the working resistance of the po wered support in the coal mining face. The study results showed that periodical weighting step distance of the coal mining face was 21.6-25.4 m and the average was 2 3.4 m.The weighting step distance of the high level roof was 56.3-62.3 m,the average was 59.3 m and the max broken height was 70 m.The thickness of the seam imme diate roof and the thickness of the base roof and high level roof were 30,20 and 20 m individually.The influence scope of the strike abutment pressure in the coal mining face was 42.7-54.2 m and the average was 48.6 m.The peak location of the abutment pressure was determined and could provide the theoretical basis to determine the advance support distance during the mining process in the mine .According to the mine strata pressure parameters obtained with the micro seismic monitoring and meas uring technology,the rational working resistance of the powered support was determined as 15 000 kN.

国家重点基础研究发展计划(973计划)资助项目(2010CB226806)；