在一次能源消费构成中煤炭约占75%,而且这一比例关系在今后相当长时期内不会改变。目前我国煤炭年生产量约12亿吨之巨!随着煤矿采空区的出现及扩展,矿区地面下沉及塌陷常有发生,还可诱发地下残 Coal accounts for about 75% of primary energy consumption and this proportion will not change for a long time to come. At present, China’s annual coal production is about 1.2 billion tons of huge! With the emergence and expansion of coal mined-out areas, mining subsidence and collapse of the ground often occur, but also induced underground residue