综放开采采空区煤炭自燃特征及其控制研究

针对7201综放面煤层易自燃、回采过程中存在工作面过断层、工作面面长加大接面等影响正常回采速度的现实条件，在理论分析和实验研究基础上，确定了高温热源的位置，及时采取了优化配备工作面风量、顶板走向长钻孔压注阻化液、设置隔漏风墙、气雾阻化及煤柱预注阻化液等综合防治煤炭自燃措施，有效抑制了工作面采空区煤炭自燃，实现了易自燃煤层综放安全开采。研究结果对类似条件的综放安全开采有现实指导价值。

Characteristics of Coal Spontaneous Combustion and Its Control in Gob Area of Fully Mechanized Caving Working Face

In mining of the fully mechanized caving working face 7201, some factors which affect the normal mining speed must be taken into consideration, including: the seam is prone to spontaneous combustion, the working face passes fault and the length of working face becomes larger during the mining process. Based on the theoretical analyses and experimental studies, the position of high temperature resource in the gob area was determined. Coal spontaneous combustion was effectively prevented due to some comprehensive measures including: pressure-equalizing ventilation technology, injecting inhibitive solution by strike horizontal long bores in the roof, building air stoppings, retardant solution spray technology by aerosol and pre-injecting inhibitive solution in coal pillars. Through the above comprehensive measures, coal spontaneous combustion in the gob area was effectively prevented and the safety mining goal for easier spontaneous combustion coal seam with fully mechanized caving was achieved. The study results give a beneficial guide to other analogical top-coal caving safely.