摘要
阜新矿区冲击地压的特点是发生冲击地压事故的区域地质构造复杂、深部开采、瓦斯含量高且瓦斯压力大，煤层及其顶底板积聚了大量的弹性势能，当煤体受到采掘活动的扰动时，弹性势能释放而发生冲击地压。进入深部开采后，冲击地压开始频繁发生，说明大采深是冲击地压发生的直接原冈。对于高瓦斯矿井，为避免瓦斯灾害而加大瓦斯抽放量，使煤层中大量瓦斯经解吸、渗流而排出，改变了煤体的物理力学性质，造成由瓦斯灾害向冲击地压事故的转变，冲击地压的频度和强度均明显增加。控制瓦斯抽放量可达到既降低瓦斯突出危险又避免冲击地压发生的目的。在有冲击地压危险倾向的采区，采用煤层注水措施，改善因瓦斯抽放造成的煤体脆性度增加的状况，可以降低冲击地压危险。
On the basis of particular case of rockburst in Fuxin coal mining area, the rockburst characteristics are introduced, and the mechanism and prevention of rockburst for high-gas deep mine are put forward. There are main particularities for the rockburst in Fuxin coal mining area, for example, the geological structure is complex, the depth of mining is deep, the gas content and pressure is great, and a great lot of elastic energy accumulates in the coal seam, roof or bottom. When the coal mass is in turmoil by mining activity, a great lot of elastic energy are released and rockburst occurs. After deep mining, rockburst continually occurs. This shows that deep mining is direct cause of rockburst. To avoid gas calamity of high-gas mine, the amount of gas-pumping is increased, and a great lot of gas is discharged from coal seam by desorption and seepage. Because the physical and mechanical properties of coal are changed, gas calamity turns to rockburst accident. Thus the frequency and intensity both increase obviously. Controlling the amount of gas-pumping can achieve the goal of reducing gas-burst hazard and avoiding rockburst. The means of the water injection in coal seam with rockburst tendentiousness can improve the state of coal brittleness increase due to gas-pumping, and rockburst danger may be reduced.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A01期5202-5205,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金重大项目（50490275）
关键词
采矿工程
高瓦斯矿井
冲击地压
瓦斯抽放
煤层注水
mining engineering
highly gassy mine
rockburst
gas-pumping
water injection in coal seam
