【導讀】我國大中型金屬礦山大多始建于上世紀5O～60年代。行深凹露天開采[1、2]。即使那些已經閉坑的鐵礦，為了回收殘留在開采境。2#掛幫礦開采實例，對高陡邊坡下采礦安全問題進行探討。開采，最低已采至168m水平，邊坡最高達440m，其高陡狀況為國內外罕見?？煽啃缘榷鄬W科內容。兩者彼此關聯(lián)，相互影響，只有確保兩者都安全，才能實。下，巖體可能發(fā)生破壞，導致邊坡變形，其最極端的結果是邊坡喪失穩(wěn)定，通過變形監(jiān)測，掌握邊坡變形的發(fā)展變化規(guī)律，進而對其進行預。邊坡監(jiān)測斷面通常選擇在地質條件差，可能破壞的部位。變形和F13斷層上盤因開采引起的側向變形。控制點設在受外界干擾少的穩(wěn)定處，選擇礦區(qū)內能通視的。監(jiān)測周期為每月一次，如遇雨季或發(fā)現(xiàn)異常位移量則加密觀測。標，觀測時間，天氣及氣溫，參與人員等。滑坡的可能性較小。效控制爆破危害；一次最大用藥量≤600kg。裝置得到振動信號。點布置方案：①在F13斷層斷面上布置兩個測點，因F13斷層貫穿2#礦體，

　　

【正文】 tion have a certain ratio between the signals, after secondary instruments and recording devices to be vibration signal. 13 (2) Monitoring instruments. Chengdu Branch using dynamic equipment developed and manufactured by Limited IDTS 3,850 blasting vibration device, with a CDa seismometer connected placed in a testing point. Test, triggering shock vibration signal instrument will record it automatically simulate voltage conversion to digital storage, these data can be stored for a long period, even after the blackout began will not be lost. After blasting through an RS 232 serial port with the standard notebook puter munications, puter waveform, spectra of the various parameters and test results form the display, storage and printing. (3) Measuring point distribution. Taking into account the impact of F13 fault, according to the topography of mine, the following measuring point distribution program : section of the fault on F13 layout measuring point two, F13 fault runs through 2 orebody, Blasting inevitable because of the slope stability。 ② blasting near the edge on the vertical layout help three measuring points, Research blasting near the slope of the vibration and shock blasting laws to help ensure the stability edge requirements. Monitoring Analysis According to the 2 ore mining process. From 2021 09 ~ 202111 blasting vibration on the right of 16 onsite monitoring, made a hanging wall ore in the process of excavation blasting vibration data. Opencast monitoring method based on the characteristics of the establishment of calculated results forms of monitoring data for statistical analysis can be drawn. 2 in the hanging wall 14 mining process blasting vibration has the following characteristics. (1) in the hanging wall ore mining blasting process, the measuring point, the vertical velocity and direction of the level of vibration velocity close, and the largest of its vibration is much less than INGENIOUS dangerous slope of the critical velocity value of 22 cm / s, Therefore it that the current blasting parameters is feasible. (2) Blasting vibration frequency slope than the natural frequencies, it is not easy slope damage. (3) The duration of blasting vibration is generally less than 500 ms. (4) Geological conditions in certain circumstances, distance and amount of drugs affecting the size of blasting vibration of the main factors, and the impact of distance than the dosage sensitive. 4, the conclusion (1) High and steep slope stability. High on the slope to help ore mining linked to the problem is necessary, slope stability monitoring the actual, make explicit purpose of monitoring pliance with the actual design and build realtime monitoring system to ensure slope stability. (2) Bursting of the high and steep slope should not be neglected, should carry out damping control, and on the basis of need, blasting vibration for realtime monitoring to ensure that safe mining. (3) The slope deformation monitoring and vibration monitoring, according to geological and engineering 15 needs, and deployed monitoring points, focused, as a prehensive, ensure slope stability. 16