The following code shows how to Disable select by checkbox.
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js"></script>
</head><!-- ww w. ja va2 s.c om-->
<body>
<div ng-app="">
Send to Office: <input type="checkbox" ng-model="checked" ng-init="checked=true"><br/>
<select id="transferTo" ng-disabled="checked">
<option>Tech1</option>
<option>Tech2</option>
</select>
</div>
</body>
</html>
The code above is rendered as follows: