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引言布伦达矿地处不列颠哥伦比亚省南部山区,其位置示于图1。矿区海拔标高约5000英尺,显示出偏北地区的典型气候,温度变化在-30℃到+30℃之间。降雪量400厘米至800厘米,且一般集中在11月份到4月份,春季径流量极大,采场内抽水量从额定的50加仑/分增加到2000加仑/分。矿体赋存在破碎的侏罗纪岩体中,此岩体被称为布伦达岩株,矿体宽度约300英尺,深度达1000英尺。布伦达岩株侵入上三叠纪奈科拉群的凝灰岩、角砾岩和泥质板岩。矿
INTRODUCTION The Brenda mine is located in the mountainous region of southern British Columbia and its location is shown in Figure 1. The elevation of the mine is about 5,000 feet above sea level, showing a typical climate in the northern part of the country with a temperature change between -30 ° C and + 30 ° C. Snowfall is between 400 and 800 centimeters and is generally concentrated between November and April. Spring runoff is extremely large and the pumping capacity in the stope increases from a nominal 50 gallons / minute to 2000 gallons / minute. Ore bodies occur in fractured Jurassic rocks, known as the Brenda Rocks, with a body width of about 300 feet and a depth of 1,000 feet. Brenda rocks invaded the tuff, breccia and muddy slate of the Upper Triassic Niquora. mine