CAJ | 학술논문

底板注浆加固与含水层改造是承压水体上煤层安全开采底板岩溶水害防治的有效方法之一。为了评价煤层底板注浆加固效果，以皖北恒源煤矿Ⅱ615工作面为研究对象，采用钻孔震波检层法，选择正常区域和异常区域，分别对各区域注浆前后底板岩体进行了波速探测，结果表明：注浆前，正常、异常区域波速存在较大差异，注浆后两者基本一致；注浆后底板砂岩段岩层波速增加明显，约为注浆前的1．20倍，而海相泥岩段注浆前后波速变化不大，这与钻孔揭露岩芯的完整性和底板水无上升现象一致，充分说明注浆对裂隙岩体起到了很好的加固作用。
저판주장가고여함수층개조시승압수체상매층안전개채저판암용수해방치적유효방법지일。위료평개매층저판주장가고효과，이환북항원매광Ⅱ615공작면위연구대상，채용찬공진파검층법，선택정상구역화이상구역，분별대각구역주장전후저판암체진행료파속탐측，결과표명：주장전，정상、이상구역파속존재교대차이，주장후량자기본일치；주장후저판사암단암층파속증가명현，약위주장전적1．20배，이해상니암단주장전후파속변화불대，저여찬공게로암심적완정성화저판수무상승현상일치，충분설명주장대렬극암체기도료흔호적가고작용。
The grouting reinforcement of the coal seam floor and the construction of aquifers are effective methods in preventing and controlling of karstic water disaster in the coal seam floor above the confined aquifer during safe mining.In order to evaluate the effect of grouting reinforcement in the coal seam floor, the authors set the Ⅱ615 working face of the Hengyuan coal mine in northern Anhui Province as the study object and selected normal regions as well as abnormal regions.In addition,wave velocity detection was conducted for floor rocks before and after grouting in each region respectively by logging with seismic wave in drill holes.The results show that there is a considerable difference in wave velocity between the normal and abnormal regions before grouting,and the wave velocities in the two regions are basically the same after grouting.The wave velocity of floor sandstone strata rises obviously after grouting and it is 1.2 times the wave velocity before grouting.However,the wave velocities of marine mudstone change only insignificantly before and after grouting, which is in accordance with the completeness of rock core and non?guide rise exposed by drill holes.All this fully indicates that grouting could play a good role in the reinforcement of crack rocks.