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中文摘要：
为了更深入了解不同强度的煤岩体注浆压裂的裂隙产生规律,通过RFPAflow软件建立二维应力应变模型,模拟了在不同强度的煤岩体下注浆过程中裂隙萌生、扩展直至模型失稳的全过程。结果表明,低强度煤岩体注浆时,注浆孔周围的应力集中,仅在其周围产生破裂而不能向外部扩散,浆液扩散困难;高强度煤岩体注浆时,浆液能量积蓄更为容易,裂隙扩散范围更大,浆液扩散范围也随之增加。研究结果揭示了不同强度的煤岩体注浆压裂裂隙产生规律,为现场实际工作进行理论指导。
英文摘要：
In order to better understand influence of coal and rock with different strength on developing rule of fracturing grouting cracks, a two-dimensional stress and strain model was built by using RFPA-flow software to simulate the generation, de- velepment and failure process of grouting cracks in coal and rock with different strength. The results showed that when the strength of coal and rock was low, the stress concentration and cracks appeared around the grouting hole, but the cracks and grouting fluid couldn＇t extend outward~ when the strength of coal and rock was increased, energy accumulation of grouting fluid was easier and extension ranges of cracks and grouting fluid were bigger. The research results revealed the developing rule of frac- turing grouting cracks in coal and rock with different strength, which provided theoretical guidance for the actual production.
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