厚硬顶板控制性放顶及矿压显现特征研究

Research on Roof Caving and Strata Pressure Characteristics of Thick Hard Roof

为了保证巨厚砂岩直覆顶板综采工作面的安全高效回采,通过对综采工作面深孔预裂爆破前后矿压显现特征指标,来考察工作面巨厚砂岩直覆顶板控制性放顶的实际效果。结果表明,深孔预裂爆破控制性放顶技术能有效保证工作面巨厚砂岩直覆顶板正常垮落,降低顶板大面积突然切断来压造成危害,为工作面的顺利回采提供保证。

In order to ensure the safe and efficient backstopping of the fully mechanized mining face in the thick sandstone straight overburden roof, this paper investigates the actual effect of the control roof of the large thick sandstone directly overlying top of the working face by analyzing the characteristic indexes of the strata pressure before and after the deep hole pre splitting blasting in fully mechanized mining face. The results show that the control roof technology of deep hole pre splitting blasting can effectively guarantee the normal collapse of the thick sandstone straight roof, reduce the damage caused by the large area of the roof, and provide the guarantee for the smooth mining of the face.