Nghiên cứu điều kiện địa cơ mỏ đá vách phục vụ chống neo tại lò dọc vỉa vận tải mức +10 lò chợ CIII- 6 -1B mỏ Vàng Danh

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Tác giả: Aushev E. V, Văn Cừ Ngô, Mạnh Hà Nguyễn, Khánh Minh Phạm, Trung Nguyên Phạm, Mạnh Đắc Phùng, Minh Thu Vương, Zakharov V. A

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Công nghiệp Mỏ, 2024

Mô tả vật lý: tr.45760

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ID: 462124

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Dữ liệu điều kiện địa cơ mỏ đá vách, trụ và vỉa than là cơ sở quan trọng để tính toán, lựa chọn các thông số kỹ thuật neo ở các mỏ than hầm lò. Nhiều nước trên thế giới đang sử dụng rộng rãi các phương pháp địa vật lý, chụp ảnh nội soi lỗ khoan, khoan lấy mẫu đá vách và phân tích tính chất cơ lý đá để khảo sát, đánh giá tổng hợp các dữ liệu điều kiện địa cơ mỏ vỉa than và khối đá bao quanh công trình. Ở các mỏ than hầm lò Quảng Ninh, khoan lấy mẫu xác định chất lượng khối đá RQD và thí nghiệm tính chất cơ lý đá là phương pháp chính để khảo sát điều kiện địa chất ban đầu phục vụ công tác thiết kế và sử dụng neo chống lò. Trên cơ sở tổng hợp kinh nghiệm nước ngoài, các tác giả đề xuất sử dụng phương pháp khảo sát tổng hợp bao gồm đo điạ chấn đường lò, chụp ảnh nội soi lỗ khoan và khoan lấy mẫu xác định tính chất cơ lý đá vách để khảo sát, đánh giá đặc điểm điều kiện địa cơ mỏ phục vụ tính toán lựa chọn các thông số kỹ thuật neo và hoàn thiện các hộ chiếu chống lò bằng vì neo hiện nay ở các mỏ than hầm lò vùng Quảng Ninh. Tổ hợp phương pháp được triển khai áp dụng tại lò dọc vỉa vận tải (DVVT) CIII-6-1B mức +10 mỏ Vàng Danh.The geomechanic data of rock mass of working roof and floor and of coal seams are an important basis to calculate and select anchor support specifications in underground coal mines. Many countries around the world are widely using geophysical methods, video endoscope of boreholes, drilling to take rock samples and analyzing rock mechanical properties to survey, to overally evaluate condition data of geomechanical coal seam and rock mass surrounding the workings. In Quang Ninh underground coal mines, drilling to take samples to determine the RQD quality of rock mass and testing for rock phisio-mechanical properties is the main method to survey the initial geological conditions for the design and use of anchors support. On the basis of summarizing foreign experiences, the authors have proposed to use a combined survey method including seismic measurement of the workings rock mass, endoscopic photography of boreholes and sampling drilling to determine the physio-mechanical properties of roof rocks to survey, evaluate the characteristics of mine geomechanical conditions to serve the calculation and selection of anchor support technical parameters and to perfect the current anchor roof passports in the underground coal mines in Quang Ninh region. The combination methods has been being applied at the roadway of stope CIII-6-1B of level +10, Vang Danh coal mine.

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