CAJ | 학술논문

声波法是现场测试巷道围岩松动破坏范围最常用的技术。基于声波法在裂隙发育围岩仰孔中进行巷道围岩松动圈厚度现场测试时的不足，提出将耦合水封闭在探头有效测试范围内的设计思路，并据此设计孔内堵水方案，研制出一种新的孔内堵水装置，并将其应用在金川深部矿区巷道围岩松动圈厚度测试工作中，测试结果表明：这种孔内堵水装置使得钻孔内耦合水集中在探头所处钻孔长度范围内，因而能够有效控制耦合水在钻孔内的渗流面积与散失速率，进而达到测试工作中探头被耦合水完全包裹的目的，使得声波信号的稳定性满足测试要求。工程实例表明：采用孔内堵水技术的设计方法在复杂围岩条件及测试环境下测试围岩破坏范围具有普遍实用性及可行性。
성파법시현장측시항도위암송동파배범위최상용적기술。기우성파법재렬극발육위암앙공중진행항도위암송동권후도현장측시시적불족，제출장우합수봉폐재탐두유효측시범위내적설계사로，병거차설계공내도수방안，연제출일충신적공내도수장치，병장기응용재금천심부광구항도위암송동권후도측시공작중，측시결과표명：저충공내도수장치사득찬공내우합수집중재탐두소처찬공장도범위내，인이능구유효공제우합수재찬공내적삼류면적여산실속솔，진이체도측시공작중탐두피우합수완전포과적목적，사득성파신호적은정성만족측시요구。공정실례표명：채용공내도수기술적설계방법재복잡위암조건급측시배경하측시위암파배범위구유보편실용성급가행성。
Acoustic testing technique is the most commonly used method on the testing of thickness of loosen zone on site. Under the condition of fracture development surrounding rock,when the field testing of thickness of loosen zone was made in the upward slant drill-ing,the deficiency of acoustic testing technique would appear,based on which,it was pro-posed that the coupling water was closed in the effective testing length of probe. Then the so-lution of water plugging in drilling was designed. According to this solution,a new kind of water plugging device was designed. Afterward,it was used in the testing of thickness of loos-en zone in the surrounding rock of roadway on the deep area of Jinchuan. Testing results showed that:by using this kind of water plugging device,the coupling water was concentrated around the extent of probe in the drilling. Therefore,the seepage area and speed of coupling water could be controlled effectively. Then the aim was attained that probe was completely encapsulated by the coupling water. Also,the stability of acoustic signal could meet the re-quirement of testing work. The example of engineering indicated that the design of water plugging device in drilling has universal practicability and feasibility during the testing of thickness of loosen zone in complex surrounding rock condition and testing environment.