### Calculate the total drill and blast cost

Assignment Help Accounting Basics
##### Reference no: EM135000

A gold mine has just completed mining waste pre-strip prior to commencing grade control mining. The waste rock was drilled and blasted for the pre-strip using 200mm diameter blast holes using a rotary blasthole drill and achieved a mining rate of 15,000 m3 per day. Blast parameters for the pre-strip were:

1. Blasthole burden         5.7m

2. Blasthole spacing        6.5m

3. Bench height               15m

5. Explosive                   ANFO        density 0.85 g/cc

6. Powder Factor        0.57 kg/m3

Fragmentation in the waste was acceptable for the excavators; these will be used for grade control mining as well as bulk waste mining. Grade control mining is to be undertaken using 115mm diameter holes to achieve sampling control; these will be drilled using a tophammer hydraulic drill. Bench height for grade control mining is to be 5m.

The waste rock has a density of 2,600 kg/m3, ore has a density of 3,200 kg/m3 due to sulphides and alteration minerals.

Q1. Scale down the waste blast parameters from 200mm to 115 mm diameter blastholes and determine explosive consumption in the waste and ore rocks.

Note: in addition to ANFO the full range of Heavy ANFO's is available from the supplier.

Q2. Determine the drill metres required to achieve a production rate from grade control blasting of 6,000 m3/day

Q3. The penetration rate for the hydraulic drill is estimated to be 50m/hr. Determine the drill productivity based on one rod change that takes 30 seconds going down the hole and 45 seconds withdrawing it from the hole. In addition two samples are collected, this stops the drill for 30 seconds per sample and tramming between holes takes 1 minute 30 seconds.

Q4. Based on two 12 hour shifts per day, giving an effective 10.5 hours of drilling (assuming two 30 minute crib breaks and a 30 minute service period at the end of each shift) will one hydraulic drill be capable of the required production?

Q5. Based on the following accessory life calculate the accessory requirements and cost:

Shank                              Life 600 m        Cost \$130.00

Coupling                           Life 500 m        Cost \$85.00

Drill Steel (3.6m length)     Life 1000m        Cost \$230.00

Drill Bit                              Life 210m        Cost \$165.00

Q6. Calculate the total drilling cost per m3 based on the following:

Drill fuel \$9.50 per drill operating hour

Drill labour cost \$22.00/shift hour

Drill maintenance \$11.50/drill shift hour

Ownership cost \$11.50/drill shift hour based on 20,000 hours working life

Q7. Calculate the total drill and blast cost based on the following blasting costs:

Explosives \$550.00/tonne

Blast initiation \$11.30/blasthole

Blast labour \$80.00/tonne of explosive

#### Questions Cloud

 What benefits of conducting performance discussions : What benefits will he or the organization realize from him investing his time to improve his skill at conducting performance discussions Perform the necessary research and calculations : Perform the necessary research and calculations regarding the best source of that product based only on total delivered (landed) cost, which includes the following- Product cost from each country Identify the technical challenges by project leader : Recommend three actions that the project leader should take in order to identify and understand the technical challenges and issues facing the project Evaluating value of long-term elements of capital structure : Determine the value of the long-term elements of the capital structure, and find out the target percentages for the optimal capital structure. Carry weights to 4 decimal places.  Evaluate the retained earnings break point. Calculate the total drill and blast cost : Calculate the total drill and blast cost based on the blasting costs Build and elucidate a prototype model : Build and elucidate a prototype model, Use your model to recommend a schedule of the burning and, if necessary buying, fuels, Use your model and its results to offer. How much can jane have in her retirement account : How much can Jane have in her retirement account at once after she makes her last contribution in Year 40, assuming a return on her investments of 9%? Optimal page replacement strategy : What is minimum number of page faults for the optimal page replacement strategy? Please show how the page is placed and how page faults occur. Law of hearsay : Outline and show the way in which the law of hearsay might affect the admissibility in court of computer-generated evidence and/or computer stored evidence.

### Write a Review

#### Evaluate prepaid expense and unearned revenue

Amounts paid on June 30 for a 1-year insurance policy, Professional fees earned but not billed as of June 30

#### Balance sheet and income statement of the company

A preliminary analytical review of the company's most recent balance sheet and income statement

#### Compute the npv of the cash flows

Tax cash flows represent taxable income in the year received, compute the NPV of the cash flows.

#### Twin peaks building supplies

Chris White was a forestry technician who had been searching for several years for a business opportunity to combine with his forestry career

#### Accounting for extractive industries

Accounting for Extractive Industries Production commences in Site One

#### Describe the discrepancy between diamond foods

Describe the discrepancy between Diamond Foods, Inc.'s description of payments to walnut growers and what the farmers themselves say the payments are for

#### Prepare solutions to the construction contracts

Please prepare solutions to the following questions concerning topics covered in the first half of the course

#### Short term financial policy

Short Term Financial Policy

#### Explain include authority and reasoning

Explain the problem with authority and resoning

#### Impacts on the quality of accounting information

Why is measurement in the context of accounting so important

#### Overview of the situation/accounting issue

You will be asked to address a accounting failure from AMERICAN INSURANCE GROUP. Overview of the situation/accounting issue