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芙蓉矿务局巡场煤矿是属于自然发火频繁的高沼气、复合煤层矿井.投产以来,采用自上而下顺序分层开采.自1981年到1983年,因开采B_2煤层时穿透B_3煤层采空区导致发火而封闭了六个工作面,损失煤炭资源12余万吨,造成B_2、B_1下覆煤层难以开采的局面.因此,曾考虑不采B_3煤层.这样一来,矿井储量将减少28.8%,服务年限将缩短23年.如果采用灌浆灭火的方法,不仅灌浆材料来源困难,而建站约需上百万元投资,吨煤成本将增加0.3～0.5元,时间不允许,资金也困难.为解决生产中的这一难题,试验组对B_2、B_3煤层采用联合开采以探索防止煤层发火.我们通过对矿压观测、采空区温度监测、通风参数测定等手段,积累了七万多个数据,
Furong Mining Bureau patrol field coal mine is naturally blazing high biogas, compound coal seam mine since its operation, the use of top-down hierarchical mining sequence from 1981 to 1983, due to the exploitation of B_2 coal seam through the B_3 coal seam mining The open space led to the fire and closed the six face, the loss of more than 120,000 tons of coal resources, resulting in B_2, B_1 under the seam difficult to exploit the situation, therefore, did not consider mining B_3 seam so that the mine reserves will be reduced 28.8 %, The service life will be shortened by 23 years.If the method of grouting fire extinguishing, not only the source of grouting material is difficult, but about a million yuan investment in construction sites, tons of coal costs will increase 0.3 to 0.5 yuan, time is not allowed, the funds are also difficult. In order to solve this problem in production, the experimental group adopted joint mining to explore and prevent the coal seam from igniting on the B_2 and B_3 coal seams.Through the means of monitoring the rock pressure, measuring the temperature of the goaf and determining the ventilation parameters, more than 70,000 data,