本文選題：采礦工程 + 氣-固耦合　； 參考：《巖土力學(xué)》2016年07期

【摘要】：為了更真實(shí)地模擬煤巖在掘進(jìn)巷道迎頭等環(huán)境下的應(yīng)力狀態(tài),研究三向應(yīng)力環(huán)境下煤巖的損傷變形及瓦斯?jié)B流情況,自主研發(fā)了真三軸氣-固耦合煤體滲流試驗(yàn)系統(tǒng)。該裝置主要由真三軸壓力室、液壓伺服系統(tǒng)、氣體滲流系統(tǒng)和監(jiān)測(cè)與控制系統(tǒng)組成,采用的試件尺寸為200 mm×100 mm×100 mm,可施加的最大軸壓(σ1)為70 MPa、最大側(cè)壓(σ2)為35 MPa、最大側(cè)壓(σ3)為10 MPa、最大瓦斯壓力為6 MPa。該裝置具有以下特點(diǎn):(1)σ1、σ2采用剛性壓頭加載,σ3采用柔性加載,三向應(yīng)力分別獨(dú)立加載;(2)設(shè)計(jì)了剛?cè)嵝詨侯^及傳壓滑桿,使得σ1與σ2方向壓頭在同時(shí)加載過程中互不干擾;(3)通過伺服液壓系統(tǒng)控制加載功能,使得裝置性能穩(wěn)定,應(yīng)力與位移加載精確,易于控制;(4)氣體滲流系統(tǒng)采用蜂窩孔對(duì)試件進(jìn)行面通氣,確保試件進(jìn)氣端瓦斯壓力均勻分布;(5)采用多種高精度傳感器進(jìn)行監(jiān)測(cè),實(shí)時(shí)記錄煤體所受應(yīng)力值、變形量及瓦斯?jié)B流量。用兩種不同應(yīng)力路徑下的滲流試驗(yàn)對(duì)該系統(tǒng)準(zhǔn)確性和可靠性進(jìn)行了驗(yàn)證,結(jié)果表明,該裝置性能穩(wěn)定可靠。該裝置可用于揭示煤與瓦斯在三向應(yīng)力條件下的耦合作用機(jī)制,為防治瓦斯災(zāi)害及研究瓦斯抽采提供了可靠的試驗(yàn)基礎(chǔ)。
[Abstract]:In order to simulate the stress state of coal and rock in the head-on environment of tunneling roadway and to study the damage deformation and gas seepage of coal and rock under three direction stress environment, a true triaxial gas-solid coupling coal body seepage test system was developed. The device consists of a true triaxial pressure chamber, a hydraulic servo system, a gas seepage system and a monitoring and control system. The size of the specimen is 200 mm 脳 100 mm, the maximum axial pressure (蟽 1) is 70 MPA, the maximum lateral pressure (蟽 2) is 35 MPA, the maximum lateral pressure (蟽 3) is 10 MPA, and the maximum gas pressure is 6 MPA. The device has the following characteristics: 1) 蟽 1, 蟽 2 is loaded by rigid head, 蟽 3 is loaded by flexible load, and 3 direction stress is loaded independently. (2) rigid flexible head and pressure transfer slider are designed. It makes 蟽 _ 1 and 蟽 _ 2 direction presser not interfere with each other in the process of simultaneous loading. The servo hydraulic system controls the loading function, which makes the device stable in performance and accurate in the loading of stress and displacement. The gas percolation system is easy to control. The honeycomb hole is used for surface ventilation to ensure the uniform distribution of gas pressure at the inlet end of the specimen. Various kinds of high precision sensors are used for monitoring, and the stress values of coal body are recorded in real time. Deformation and gas seepage flow. The accuracy and reliability of the system are verified by seepage tests under two different stress paths. The results show that the performance of the system is stable and reliable. The device can be used to reveal the coupling mechanism of coal and gas under the condition of three direction stress. It provides a reliable experimental basis for preventing and controlling gas disaster and studying gas drainage.
【作者單位】： 山東科技大學(xué)礦業(yè)與安全工程學(xué)院;山東科技大學(xué)礦山災(zāi)害預(yù)防控制省部共建國家重點(diǎn)實(shí)驗(yàn)室培育基地;中煤科工集團(tuán)重慶研究院瓦斯災(zāi)害監(jiān)控與應(yīng)急技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(No.51304128,No.51304237) 山東省自然科學(xué)基金(No.ZR2013EEQ015) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助課題(No.20133718120013) 山東科技大學(xué)杰出青年科技人才支持計(jì)劃資助(No.2015JQJH105);山東科技大學(xué)研究生創(chuàng)新基金資助項(xiàng)目(YC150305) 山東省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目資助(No.2015GSF120016)~~
【分類號(hào)】：TD712
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本文編號(hào)：2032315