The dynamic disasters of coal and gas outburst are serious in Fengcheng Coal Mining Area, the single B4 coal seam being mined is a gently inclined medium-thick seam featured by high gas pressure and content, loose and low gas permeability. In this paper statistical analysis was made on the characteristics and regularity of 186 coal and gas outbursts according to the gas occurrence features in this mining area; to counter to the increase of the dominant outbursts induced by stress with the increase of mining depth, the parting disaster treatment measures were proposed, the stereo gas drainage system was established and exploration was carried out on some new technological measures such as long-hole pre-splitting blast, long-hole drilling along roof strike, hydraulic reaming, hydraulic fracturing and so on, this thus provided theoretical guidance for the prevention and control of gas outbursts in this mining area.

In this paper, study was carried out on the control features of the regional and mine field structure based on the actual coal-bed gas geological data and by using the coal-bed gas geology theory; statistical analysis on the outburst data was made and the characteristics of coal and gas outburst in Pinghu Coal Mine were summarized; analysis was carried out on the influence and control effect of the regional evolution, the occurrence depth of coal seams, the lithological characters of roof anf floor rock, the coal seam thickness and its change, the nature of coal, the mine structure and mining factors upon coal and gas outburst. The analyzing results showed that the lithological characters of roof anf floor rock, the coal seam thickness and its change and the mining factors had significant influence on coal and gas outburst, and the fault structure controlled the occurrence and distribution rule of outburst. Therefore, the dangerios regions of outburst can be divided according to the coal-bed gas geological conditions, thus better directing the prevention work of coal and gas in a coal mine and providing an analyzing method for regional coal and gas outburst control in coal mines with similar conditions.

分析了李嘴孜煤矿A1煤层掘进工作面煤与瓦斯突出预测的主要指标,通过现场实测数据分析得出李嘴孜煤矿主要敏感指标,并利用模糊数学层次法对主要指标进行了重要性排序,为采煤工作面煤与瓦斯突出的预测和防治提供了科学的依据。

通过对李嘴孜矿A1煤层突出危险预测方法和预测指标敏感性及其临界值的考察研究,确定出了李嘴孜A1煤层煤与瓦斯突出预测指标的敏感指标及其临界值.A1煤层突出预测敏感指标及其临界值的得出,能进一步提高矿井生产能力,为矿井的安全高效生产提供保障.

急倾斜岩层地质破碎带巷道的复修支护是当前困扰矿区生产的技术难题。结合现场实测资料,采用RFPA2D数值计算软件对攀枝花太平煤矿南三运输大巷进行了模拟研究,采用先加载后开挖的顺序,再现了巷道开挖与围岩破坏和垮落过程,分析了破碎带巷道的破坏特征,揭示了巷道变形、破坏的机理是沿着软弱层及层理的拉伸及剪切破坏。据此,提出了合理的支护方案,可为此类巷道的修复支护提供借鉴。

煤层瓦斯压力的准确测定能够为矿井制定合理有效的防治瓦斯灾害措施提供依据。在复杂地质条件下进行瓦斯压力测定,封孔质量的好坏将直接影响着煤层瓦斯压力的测定情况。通过对矿井复杂地质条件下煤层瓦斯压力测定的实践,经过分析和总结,在煤层瓦斯压力测定中取得了上向钻孔和下向钻孔封孔工艺的新认识,为在复杂地质条件下采取合理的测压封孔工艺提供了参考,可更好地指导矿井煤层瓦斯基本参数的测定,为更好地确定瓦斯治理方案提供可靠的依据。

针对煤与瓦斯突出是多因素共同作用的抵制动力现象,分析了影响采煤工作面煤与瓦斯突出的主控因素,并利用模糊数学层次法对主控因素进行了重要性排序,为采煤工作面煤与瓦斯突出的预测和防治提供了科学的依据。