CAJ | 학술논문

在实施井下钻孔水压致裂地应力测量的同时,评价岩层阻水性能,确定导升带高度,做到一孔多用.测试区实际观测表明,泥岩、粉砂岩、中砂岩、灰岩阻水性能由大到小,导升高度则由小变大,平均导升高度约3.2m;地应力测量表明,该测试区原始地应力状态为S_H>S_v>S_h,最大水平主应力方向NE至NEE.突水临界指数评价表明,-550m水平采煤工作面掘进时突水的可能性较大,应当采取防范措施.
재실시정하찬공수압치렬지응력측량적동시,평개암층조수성능,학정도승대고도,주도일공다용.측시구실제관측표명,니암、분사암、중사암、회암조수성능유대도소,도승고도칙유소변대,평균도승고도약3.2m;지응력측량표명,해측시구원시지응력상태위S_H>S_v>S_h,최대수평주응력방향NE지NEE.돌수림계지수평개표명,-550m수평채매공작면굴진시돌수적가능성교대,응당채취방범조시.
In a single hole with multi-purposes, the evaluation ability of water-resistance and confirming progressive intrusion height can be put in practice during the process of geostresses tests with the in-situ hydraulic fracturing method in mining working faces or roadways. Test results in practice show that the abilities of the water-resistances of mudrocks, fine sandstones, middle sandstones, limestones are from large to small. The progressive intrusion heights are from small to large. The abilities of the water-resistances of strata in the floor Nos. 11, 10, 7, 8 of the coal seams are from large to small. The strata stabilities in the floor Nos. 8, 11, 7, 10 of the coal seams are also from large to small. Geostress tests with the in-situ hydraulic fracturing method indicate that the original geostress states are S_H >S_v > S_h. The directions of the maximum horizontal stress are from NE to NEE in this area. The water inrush critical index evaluation shows that the water inrush possibility is higher as thcoal extraction into the-550m level. Preventive measures should be undertaken earlier.