FAILURE CHARACTERISTICS OF SURROUNDING ROCKS IN COAL SEAM MINING ROADWAY

Öz

In order to provide technical support for grouting engineering of broken surrounding rock in roadway. Taking a certain mine in Jin coal mine area as a test mine, drilling TV and segmented water injection tests were used to detect the damage characteristics of surrounding rocks, and the numerical simulation of stress characteristics during the failure process was carried out. The research results show that the crack width of the surrounding rock can be reduced to four areas from the inside to the outside, and the crack widths are different. After the excavation of the roadway, the stress concentration occurs inside the coal and rock mass. With the excavation, the stress exceeds the strength of the coal and rock mass, and the failure occurs, and the stress concentration phenomenon continues to develop deep; the radial direction of the roadway is divided into four areas: completely broken zone, fracture reduction zone, fractured compression zone and proto-rock-like area.

Anahtar Kelimeler

• Mining engineering
• Fissure
• Surrounding rock of roadway
• Numerical simulation

Kömür madenlerindeki yollarda yan kayaçların yenilme özellikleri

Öz

Yolda kırılmış çevreleyen kayaların enjeksiyon mühendisliğine teknik destek sağlamak için. Jin kömür madeni sahasında belirli bir madenin test madeni olarak alınması, çevredeki kayaların hasar özelliklerini tespit etmek için sondaj TV ve segmentli su enjeksiyon testleri kullanılmış ve kırılma sürecinde stres özelliklerinin sayısal simülasyonu gerçekleştirilmiştir. Araştırma sonuçları, çevredeki kayanın çatlak genişliğinin içten dışa doğru dört alana indirilebileceğini ve çatlak genişliklerinin farklı olduğunu göstermektedir. Yolun kazılmasından sonra, kömür ve kaya kütlesi içinde stres yoğunluğu oluşur. Kazı ile stres, kömürün ve kaya kütlesinin gücünü aşar ve başarısızlık meydana gelir ve stres yoğunlaşma fenomeni derin bir şekilde gelişmeye devam eder; karayolunun radyal yönü dört alana bölünmüştür: tamamen kırık bölge, çatlak azaltma bölgesi, çatlak sıkıştırma bölgesi ve proto-kaya benzeri alan.

Anahtar Kelimeler

• Maden Mühendisliği
• Fissür
• Surrounding rock of roadway
• Numerical simulation

Kaynakça

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